CN112145826A - Stainless steel or copper friction welding movable joint and manufacturing process - Google Patents
Stainless steel or copper friction welding movable joint and manufacturing process Download PDFInfo
- Publication number
- CN112145826A CN112145826A CN202011119895.2A CN202011119895A CN112145826A CN 112145826 A CN112145826 A CN 112145826A CN 202011119895 A CN202011119895 A CN 202011119895A CN 112145826 A CN112145826 A CN 112145826A
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- China
- Prior art keywords
- joint
- inner sleeve
- nut
- stainless steel
- welding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 56
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 31
- 239000010949 copper Substances 0.000 title claims abstract description 31
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 31
- 239000010935 stainless steel Substances 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000003780 insertion Methods 0.000 claims 2
- 230000037431 insertion Effects 0.000 claims 2
- 239000000463 material Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/02—Welded joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/127—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding friction stir welding involving a mechanical connection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/0206—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the collar not being integral with the pipe
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/0212—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means
- F16L19/0218—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means comprising only sealing rings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention provides a stainless steel or copper friction welding movable joint and a manufacturing process, wherein the movable joint comprises: one side of the nut is provided with an inner flange; and one side of the inner sleeve is provided with an outer flange which can be abutted against the inner flange, and the other side of the inner sleeve is welded and connected with the welding part of the first joint. When welding, the inner sleeve is placed into the nut, the outer flange of the inner sleeve is connected with the inner flange of the nut, the nut can move relative to the inner sleeve, and the end face of the other side of the inner sleeve is welded with the welding part of the first joint; in addition, the inner sleeve and the first joint are connected in a welding mode to form an assembly, so that the assembly is convenient to process, good in sealing performance and long in service life, and the mechanical performance, the water pressure and the flow can meet the requirements of joint standards.
Description
Technical Field
The invention relates to the technical field of water pipe joints, in particular to a stainless steel or copper friction welding movable joint and a manufacturing process thereof.
Background
The movable joint is a common pipeline connecting piece which can be conveniently assembled and disassembled, and is widely applied to pipeline connection in multiple industries such as water supply pipelines, gas transmission pipelines and the like.
Common loose joint on the market, as shown in fig. 5, including nut 03, and locate nut 03 both sides, the first joint 01 and the second joint 02 that link to each other with two pipelines, first joint 01 and second joint 02 all are equipped with the internal thread that can link to each other with the pipeline, the inner wall left side of nut 03 is equipped with the internal thread that can connect 02 threaded connection with the second, its inner wall right side is equipped with interior flange 04, the left side of first joint 01 is equipped with the outer flange 05 that can offset with interior flange 04. When the movable joint is assembled, the first joint 01 firstly penetrates through a central hole of the nut 03 from left to right, the outer flange 05 of the first joint is abutted against the inner flange 04, and then the second joint 02 is in threaded connection with the nut 03, so that the nut 03, the first joint 01 and the second joint 02 form an assembly. The structure of the inner flange 04 and the outer flange 05 enables the opposite side size of the nut 03 to be larger than that of the first joint 01, so that the production cost of the nut 03 is increased, and the nut 03 is not suitable for being installed and used in a narrow space due to the fact that the installation space is large.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defects that the size of the opposite side of the nut of the movable joint is larger than that of the first joint, which results in increased production cost and is not suitable for installation and use in a narrow space in the prior art, so as to provide a stainless steel or copper friction welding movable joint which has low production cost and is suitable for use in a narrow space, and a process for manufacturing the movable joint.
Therefore, the invention provides a stainless steel or copper friction welding movable joint which comprises a nut, an inner sleeve and a first joint, wherein an inner flange is arranged on one side of the nut; and one side of the inner sleeve is provided with an outer flange which can be abutted against the inner flange, and the other side of the inner sleeve is welded and connected with the welding part of the first joint.
The welding part is formed with a positioning groove for the inner sleeve to insert into.
The positioning groove is provided with a chamfer for guiding the inner sleeve to insert.
The outer wall of the first joint is provided with an external thread which can be connected with the pipeline internal thread, or the inner wall of the first joint is provided with an internal thread which can be connected with the pipeline external thread.
And a second joint which can be in threaded connection with the nut is arranged on one side of the nut, which is far away from the inner sleeve.
And the outer wall of the second joint, which is far away from the inner sleeve, is provided with an external thread which can be connected with the pipeline internal thread, or the inner wall of the second joint is provided with an internal thread which can be connected with the pipeline external thread.
And a sealing gasket is arranged between the second joint and the inner sleeve.
The nut, the inner sleeve, the first joint and the second joint are made of stainless steel or copper.
The invention also provides a process for manufacturing the stainless steel or copper friction welding movable joint, which comprises the following steps: s1, connecting the inner sleeve with the nut, and enabling the outer flange of the inner sleeve to abut against the inner flange of the nut; s2, inserting the inner sleeve into the positioning groove of the first joint, and welding the inner sleeve and the first joint; and S3, placing the sealing gasket into the nut, and connecting and sealing the second connector and the nut.
In step S2, the inner sleeve and the first joint are joined by friction welding.
The technical scheme of the invention has the following advantages:
1. the invention provides a stainless steel or copper friction welding movable joint which comprises a nut, an inner sleeve and a first joint, wherein an outer flange capable of abutting against the inner flange is arranged on one side of the inner sleeve, and the other side of the inner sleeve is connected with a welding part of the first joint in a welding mode. When welding, the inner sleeve is placed into the nut, the outer flange of the inner sleeve is connected with the inner flange of the nut, the nut can move relative to the inner sleeve, and the end face of the other side of the inner sleeve is welded with the welding part of the first joint; in addition, the inner sleeve and the first joint are connected in a welding mode to form an assembly, so that the assembly is convenient to process, good in sealing performance and long in service life, and the mechanical performance, the water pressure and the flow can meet the requirements of joint standards.
2. According to the stainless steel or copper friction welding movable joint provided by the invention, the positioning groove for inserting the inner sleeve is formed in the welding part, and the positioning groove is arranged, so that the welding of the inner sleeve and the first joint after positioning is facilitated, the welding area of the inner sleeve and the first joint is increased, and the welding is firmer.
3. According to the stainless steel or copper friction welding movable joint provided by the invention, the positioning groove is provided with the chamfer for guiding the inner sleeve to insert, so that the inner sleeve and the first joint are concentrically welded after positioning.
4. According to the stainless steel or copper friction welding movable joint provided by the invention, the outer wall of the first joint is provided with an external thread which can be connected with the internal thread of the pipeline, or the inner wall of the first joint is provided with an internal thread which can be connected with the external thread of the pipeline; the outer wall of the second joint is provided with an external thread which can be connected with the internal thread of the pipeline, or the inner wall of the second joint is provided with an internal thread which can be connected with the external thread of the pipeline. Therefore, the specifications of the first joint and the second joint are the same or different, customers can flexibly select the first joint and the second joint according to actual requirements, and the application range is expanded.
5. According to the process for manufacturing the stainless steel or copper friction welding movable joint, the inner sleeve is connected with the first joint through friction welding in a welding mode, welding is quicker and more convenient through the friction welding, the quality is reliable, and the production efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view of a first embodiment of a stainless steel or copper friction weld union joint of the present invention;
FIG. 2 is a schematic structural view of a first joint;
FIG. 3 is a schematic structural view of a second embodiment of a stainless steel or copper friction welded union;
FIG. 4 is a schematic structural view of a third embodiment of a stainless steel or copper friction welded union;
fig. 5 is a schematic structural diagram of a prior art union.
Description of reference numerals: 01. a first joint; 02. a second joint; 03. a nut; 04. an inner flange; 05. an outer flange;
1. a nut; 11. an inner flange; 2. an inner sleeve; 21. an outer flange; 3. a first joint; 31. welding the part; 32. positioning a groove; 33. chamfering; 4. a second joint; 5. a gasket seal.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Examples
The present embodiment provides a stainless steel or copper friction welding movable joint, as shown in fig. 1 and 2, comprising a nut 1, an inner sleeve 2, a first joint 3, a second joint 4 and a sealing gasket 5.
The inner wall of the nut 1 is provided with internal threads, and the right side of the nut 1 is provided with an inner flange 11 extending along the radial direction.
And an inner sleeve 2 having an outer flange 21 on one side thereof abutting against the inner flange 11 and a welding portion 31 welded to the first joint 3 on the other side thereof.
The first joint 3 has a welding portion 31 provided on one side end surface thereof, and as shown in fig. 2, the welding portion 31 is formed with a positioning groove 32 into which the inner housing 2 is inserted, and the positioning groove 32 is provided with a chamfer 33 into which the inner housing 2 is guided. The outer wall of the first connector 3 is provided with an external thread which can be connected with the pipeline internal thread, or the inner wall of the first connector is provided with an internal thread which can be connected with the pipeline external thread.
The second joint 4 is arranged on one side, far away from the inner sleeve 2, of the nut 1, an external thread connected with the internal thread of the nut 1 is arranged on one side, near to the inner sleeve 2, of the second joint 4, and an external thread capable of being connected with the pipeline internal thread is arranged on the outer wall, far away from the inner sleeve 2, of the second joint 4, or an internal thread capable of being connected with the pipeline external thread is arranged on the inner wall of the second joint. As shown in fig. 1, the first joint 3 is provided with an internal thread connected to the pipeline; as shown in fig. 3, the first joint 3 and the second joint 4 each have an external thread to be connected to a corresponding pipe. As shown in fig. 4, the first connector 3 is provided with an internal thread connected to the pipeline, and the second connector 4 is provided with an external thread connected to the pipeline.
And the sealing gasket 5 is arranged between the second joint 4 and the inner sleeve 2.
In this embodiment, the nut 1, the inner sleeve 2, the first joint 3, and the second joint 4 are made of stainless steel or copper.
The invention relates to a manufacturing process of a stainless steel or copper friction welding movable joint, which comprises the following steps: s1, connecting the inner sleeve 2 with the nut 1, and enabling the outer flange 21 of the inner sleeve 2 to be abutted against the inner flange 11 of the nut 1; s2, inserting the inner sleeve 2 into the positioning groove 32 of the first joint 3, and welding the inner sleeve 2 and the first joint 3; and S3, placing the sealing gasket 5 into the nut 1, and connecting and sealing the second joint 4 and the nut 1. In the S2 step, the inner case 2 and the first joint 3 are joined by friction welding.
The invention provides a stainless steel or copper friction welding movable joint, which comprises a nut 1, an inner sleeve 2 and a first joint 3, wherein one side of the inner sleeve 2 is provided with an outer flange 21 which can be abutted against an inner flange 11, and the other side of the inner sleeve is connected with a welding part 31 of the first joint 3 in a welding way. When in welding, the inner sleeve 2 is placed into the nut 1, the outer flange 21 of the inner sleeve 2 is connected with the inner flange 11 of the nut 1, the nut 1 can move relative to the inner sleeve 2, and the end face of the other side of the inner sleeve 2 is connected with the welding part 31 of the first joint 3 in a welding way; in addition, the inner sleeve 2 and the first joint 3 form a component in a welded connection mode, so that the processing is convenient, the sealing performance is good, the service life is long, and the mechanical performance, the water pressure and the flow can meet the requirements of joint standards.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A stainless steel or copper friction weld loose joint, comprising:
a nut (1) having an inner flange (11) provided on one side thereof;
and the inner sleeve (2) is provided with an outer flange (21) which can be abutted against the inner flange (11) on one side, and is welded and connected with the welding part (31) of the first joint (3) on the other side.
2. Stainless steel or copper friction welded union according to claim 1, characterized by the fact that the welded portion (31) is shaped with a positioning slot (32) for the insertion of the inner sleeve (2).
3. Stainless steel or copper friction welding union according to claim 2, characterized in that the positioning slot (32) is provided with a chamfer (33) for guiding insertion of the inner sleeve (2).
4. A stainless steel or copper friction welding loose joint according to any of the claims 1-3, characterized in that the first joint (3) is provided with external threads on its outer wall that can be connected to internal threads in a pipeline, or with internal threads on its inner wall that can be connected to external threads in a pipeline.
5. Stainless steel or copper friction welding union according to claim 4, characterized in that the side of the nut (1) remote from the inner sleeve (2) is provided with a second joint (4) which can be screwed thereto.
6. Stainless steel or copper friction welding union according to claim 5, characterized in that the outer wall of the second union (4) remote from the inner sleeve (2) is provided with external threads that can be connected to internal threads of a pipeline, or the inner wall thereof is provided with internal threads that can be connected to external threads of the pipeline.
7. Stainless steel or copper friction welding loose joint according to claim 6, characterized in that a sealing gasket (5) is provided between the second joint (4) and the inner sleeve (2).
8. Stainless steel or copper friction welding union according to any of claims 5-7, characterized in that the material of the nut (1), the inner sleeve (2), the first joint (3) and the second joint (4) is stainless steel or copper.
9. A process for manufacturing a stainless steel or copper friction welded union, comprising the steps of:
s1, connecting the inner sleeve (2) with the nut (1) to enable the outer flange (21) of the inner sleeve (2) to be abutted against the inner flange (11) of the nut (1);
s2, inserting the inner sleeve (2) into the positioning groove (32) of the first joint (3), and welding the inner sleeve (2) and the first joint (3);
and S3, placing the sealing gasket (5) into the nut (1), and connecting and sealing the second connector (4) and the nut (1).
10. A process of manufacturing a stainless steel or copper friction weld union as set forth in claim 9 wherein: in step S2, the inner sleeve (2) and the first joint (3) are joined by friction welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011119895.2A CN112145826A (en) | 2020-10-19 | 2020-10-19 | Stainless steel or copper friction welding movable joint and manufacturing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011119895.2A CN112145826A (en) | 2020-10-19 | 2020-10-19 | Stainless steel or copper friction welding movable joint and manufacturing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112145826A true CN112145826A (en) | 2020-12-29 |
Family
ID=73953972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011119895.2A Pending CN112145826A (en) | 2020-10-19 | 2020-10-19 | Stainless steel or copper friction welding movable joint and manufacturing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112145826A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983253A (en) * | 2021-10-28 | 2022-01-28 | 核工业西南物理研究院 | Nut type loose flange structure and combined tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6250686B1 (en) * | 1999-01-25 | 2001-06-26 | Zurn Industries, Inc. | Combination mechanical/fusion pipe fitting |
| CN1755179A (en) * | 2004-09-29 | 2006-04-05 | 东尾机械株式会社 | Pipe joint |
| CN204785156U (en) * | 2015-07-28 | 2015-11-18 | 东风康明斯发动机有限公司 | Engine advances oil return resistance test connector with it connects to match cutting ferrule formula |
| CN108571612A (en) * | 2018-06-22 | 2018-09-25 | 中国华能集团清洁能源技术研究院有限公司 | Device for quickly connecting water pipe |
| CN109707923A (en) * | 2019-01-30 | 2019-05-03 | 乐清市牵引机电厂 | A kind of welding structure, flexible pipe and manufacturing process |
| CN213299121U (en) * | 2020-10-19 | 2021-05-28 | 乐清市牵引机电厂 | Stainless steel or copper friction welding movable joint |
-
2020
- 2020-10-19 CN CN202011119895.2A patent/CN112145826A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6250686B1 (en) * | 1999-01-25 | 2001-06-26 | Zurn Industries, Inc. | Combination mechanical/fusion pipe fitting |
| CN1755179A (en) * | 2004-09-29 | 2006-04-05 | 东尾机械株式会社 | Pipe joint |
| CN204785156U (en) * | 2015-07-28 | 2015-11-18 | 东风康明斯发动机有限公司 | Engine advances oil return resistance test connector with it connects to match cutting ferrule formula |
| CN108571612A (en) * | 2018-06-22 | 2018-09-25 | 中国华能集团清洁能源技术研究院有限公司 | Device for quickly connecting water pipe |
| CN109707923A (en) * | 2019-01-30 | 2019-05-03 | 乐清市牵引机电厂 | A kind of welding structure, flexible pipe and manufacturing process |
| CN213299121U (en) * | 2020-10-19 | 2021-05-28 | 乐清市牵引机电厂 | Stainless steel or copper friction welding movable joint |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983253A (en) * | 2021-10-28 | 2022-01-28 | 核工业西南物理研究院 | Nut type loose flange structure and combined tool |
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